Competitive Exams: Zoology MCQs (Practice-Test 96 of 112)

  1. The correct sequence of various sub-layers in the epidermis of vertebrates integument starting from outside is

    1. Stratum germinativum, stratum spinosum, granulosum, stratum lucidum, stratum corneum

    2. Stratum germinativum, stratum corneum, granulosum, stratum lucidum

    3. Cuticle, endodermis, dermis, hypodermis

    4. Stratum corneum stratum lucidum, stratum granulosum, stratum spinosum, stratum germinativum

  2. Which one of the following groups of mammals is considered to be toothless?

    1. Echidna, whalebone whales, anteaters and platypus

    2. Whales, marsupials, anteaters and platypus

    3. Bat, whales, marsupials and Echidna

    4. Echinda, whales, bat and platypus

  3. Which one of the following is the correct set of components required to fulfill the respiratory needs of the animal?

    1. Source of oxygen, a respiratory surface, respiratory pigment and respiratory medium

    2. Source of CO2, a respiratory surface, respiratory pigment and respiratory medium

    3. Source of oxygen, source of CO2, a respiratory surface and respiratory pigment

    4. Water, source of oxygen, respiratory pigment and respiratory medium

  4. Which one of the following statements is correct?

    1. The red corpuscles in the mammalian blood have no nuclei

    2. The red corpuscles in the amphibian blood have no nuclei

    3. The red corpuscles in the mammalian blood are not circular

    4. In mammals, the renal portal system of circulation is well developed

  5. Viviparity is a common phenomenon in mammals. However, members of one order of the class are exception. They do not given birth to young ones. Which one of the following orders constitutes the exception?

    1. Sirenia

    2. Cetacea

    3. Monotremata

    4. Dermoptera

  6. Which one of the following pairs is correctly matched? Copulatory organs Animals

      • Claspers
      • Elasmobranch fish
      • Gonopodium
      • Male snakes
      • Hemipenis
      • Crocodiles
      • Penis
      • Teleostean fish
  7. Which one of the following statements regarding autonomic nervous system is correct?

    1. It is actually a part of the central nervous system and is made up of motor neurons

    2. It is actually a part of the peripheral nervous system and is made up of motor neurons

    3. It is actually a part of the central nervous system and is made up of sensory neurons

    4. It is not actually a part of the peripheral nervous system and is made up of sensory and motor neurons

  8. The temperature regulating centre in brain is located at

    1. Pons

    2. medulla oblongata

    3. thalamus

    4. hypothalamus

  9. Reflex action is

    1. an immediate voluntary response to a sensory stimulus

    2. an immediate involuntary response to a sensory stimulus

    3. a delayed voluntary response to a sensory stimulus

    4. a delayed involuntary response to a sensory stimulus

  10. Cytoplasm of neurons contains Nissl granules which are small masses of

    1. RNA

    2. DNA

    3. mRNA

    4. silver

  11. The receptor pigment vertebrates is for light in the eyes of all land

    1. chlorocrurin

    2. haemoglobin

    3. melanin

    4. rhodopsin

  12. Colour-blindness is characterised by

    1. absence of rod cells in retina

    2. absence of cone cells in retina

    3. absence of lustre of lens

    4. lack of colour pigments in the eye

  13. If an aqueous homogenate of the gastric mucosa of rabbit is heated to 70 degree C and cooled down to room temperature and if this sample. Is then allowed to react with egg white, the enzyme substrate reaction will not take place because the

    1. pH of the medium has been altered

    2. protein is denatured on heating to a higher temperature

    3. coenzymes are absent

    4. concentration of hydrochloric acid has been altered during heating

  14. Trypsin differs from pepsin in that

    1. trypsin digests protein in an acidic medium while pepsin does so in an alkaline medium

    2. trypsin digests protein in an alkaline medium while pepsin does so in an acidic medium

    3. trypsin is secreted from the gastric glands while pepsin is secreted from the pancreas

    4. trypsin production is influenced by peptidergic neurohormones, while pepsin is influenced by steroids

  15. The physiology of osmoregulation is tackled in several ways by the animals. Which one of the following is applicable to the marine telcosts only?

    1. these are hypotonic and make up for the lost water by drinking seawater and excreting the excess salts by the gills

    2. These have low salt contents but are in osmotic equilibrium with sea water, because they are capable of retaining urea in their blood

    3. They are iso-osmotic with regard to their habitat hence do not require any adaptive measure

    4. Their salt and ionic contents keep them hyperosmotic and excess water inflow is controlled with, the help of bills and kidneys